Roller mill



Jan. 6. 1925. 1,522,456

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' c.-T. HowsoN A ROLLER MILL Filed July 31, 1918 9 Sheets-Sheet, l9

Patented Jan. 6, 1925.

UNITED STATES CHARLES T. HOWSON, 0F SLVER CREEK, NEW YORK.

ROLLER PJIILL.

Application :filed July 3i, i918. Serial No. 247,560.

To @ZZ whom t may conce/m.'

Be it known that l, CHARLES T. HowsoN.I a citizen of the UnitedStates,residing at Silver Creek, in the county of Chautauqua and Stateof New York, have invented certain new and useful improvements in RollerMills, of which the following is a specification.

This invention relates to mills, and more particularly to that typeknown as self-contained roller mills in which the constituent parts areconiined within a single enclosure, and into which the grain isintroduced and operated upon in .its vflow through the mili anddischarged in the i'form of iiour with the oii'al discharged through aseparate exit or exits.

One oi the objects of my invention is to provide a mill of this type inwhich the separation ot' the ground stock .is greatly simpli tied and bymeans ot which a high yield ot' flour is secured.

Another object of my invention is the construction of a flour mill inwhich the bran is separated from the fiour during the initial portion oithe flow of the stock through the mill so as to avoid its coming incontact with the Hour in the bolting reels and to prevent its enteringsaid reels, which are silk or wire-covered, this being highly desirablesince the action of bran on the silk or tine Wire ot' the reels wouldquickly cause holes to be worn therethrough.

Another object of my invention is the provision oi' a dust collectingdevice which is cleaned automatically, thereby aliowing increasedsuction over existing mills without drawing off good YHour, whichresults in more eifective cooling and Ventilating conditions within themill and avoids what is generally termed sweating Another object oi" my1invention is the provision of a mill having v in/iproved centrifugalreels tor scalping, grading and dressing the Hour.

Another object of my invention is the provision of bolting reels whichare removably arranged within the housing of the mill and capable ofbeing removed therefrom through the tail end of the machine withoutdisassembling 'the parts thereof and without separating any parts of thehousing eX- cept the bearing members for the shafts of the reels.

Further objects of my invention will appear from the description tofollow.

The invention consists inthe novel fea` tures of construction'and in thearrangement and combination of parts to be herein after described andmore particularly pointed out in, the ksubjoined claims.

in the drawings I have illustrated one embodiment of my invention, vandin said drawings,

Fig. l is a head end elevation of my improved mill.

Fig. 2 is a tail end elevation of the same.

Fig. 3 is a side elevation of the mill with the enclosing walls removedfrom the frame and portions of the conveyer tubes broken away to showportions of the conveyers therein.

Fig. 4 is a longitudinal section taken on the irregular line o o, Fig.5.

Fig. 5 is a transverse section on an enlarged scale taken on line -Z),Fig. 3.

Fig. 6 is a transverse section on an enlarged scale taken on line 0 0,Fig. 3, looking toward the left.

Fig. 7 is a transverse section taken on line Z-fZ, Fig'. 3.

Fig. 8 is a transverse section taken on line 6-e, Fig. 3.

F 9 is a transverse section taken 4on line 0 0, Fig. 3, looking towardthe right.

Fig. 10 is a longitudinal section taken on line f-f, Fig. 7, lookingtoward the lett.

Fig. ll is a sectional elevation of one of the roll adjusting devicesviewed 'from the inner side thereof.

Fig. l2 is a transverse section through one of the bolting reels.

Y Fig. 13 is a detail view of the quick release operating mechanism torquickly separating the rolls.

Fig. 14 is a diagrannnatic view showing the break and reduction reeis,the brush scalpers for the break reels, the bolting reels, and the flowof stock through these parts.

Although various changes maybe made in the details of construction andin the arrangement of parts without departing from the spirit or scopeof my invention as defined in the appended ciaims, i have shown arepresentative construction in the drawings, in which the referencenumeral i designates the complete unit or mill having a after explained.

The head end wall 6, thel tail end wall 7, both of which form part of.the housing 2, and the two intermediate walls 8, 9, respectively, whichseparate the three parts or sections 3, 4 and 5, are preferably castingsformed to the shape of the mill transversely, and in which the variousrotatable parts of the mill are journaled, also by means of which otherparts are supported. These walls may be termed transverse frame membersand these frame members are connected at thebottom bylongitudinally-disposed angle irons 10 serving as sills which provideproper bearing faces for contact with the floor or foundation on whichthe machineis set. Longitudinally-disposed angle irons 11 connect theupper ends of these frames together. Connecting the head end transversemember 6 with the adjacent intermediate transverse frame member 8 atpoints between their upper and lower ends are channel beams 12 which aresecured to opposite side edges of these frame members and extend adistance forward or 1n advance of the head end frame member 6,

as clearly shown in Fig. 3.

A transverse bearing member 13 is riveted or otherwise fastened atopposite ends to the outer ends of said channel beams. Said channelbeams and the transverse bearing member 1 3 therefore constitute asupplemental frame to which, midway between the ends of said transversemember, a bearing 14 is secured in which the main or driving shaft 15 ofthe machine is journaled. The frame work is closed at the top, bottomand sides to form a housing or enclosure for the machine.v For thispurpose, a to-p wall l16 is provided which receives support from theopposite longitudinal channel irons at the upper ends of the transverseframe members and is secured thereto in any suitable man.- ner. Sidewalls 17 are provided which close the sides of the machine and may besecured in any suitable manner to the` side edges of bearing member 13of the supplemental frame. A pulley 20 is also secured to said driveshaft and located inside of said transverse bearing member. From thepulley 20, one of each of the two pairs of break rolls and the two pairsof reduction rollsY are driven; also one of the rotary scalpers, as willappear hereinafter. A feed spout 21 is arranged in -the top of thevhousing through which the grain is fed into the machine, and a slidingcut-off 22 is movable within said spout to regulate the flow of thegrain or to entirely shut off the same. This spout or feeding device, asit may be termed, pro-jects into the roll part or section 3 of themachine between the transverse frame members 6' and 8, and delivers thegrain onto a shoe or vibrating shaker 23 having a distributing device 24at one end thereof directly over the first pair of break rolls, whichthe rolls 25, 26 1constitute.. ThisV distributing device has an inclinedtable 27 provided with upstanding` ledges 28,V 29,

respectively, at and near itsV lower end. Above said inclined table anadjustable plate 30 is arranged between which and the table a passage 31is provided. Beneath the lower end of the inclined table a second table32 is provided which is inclined in an opposite direction and hasupstanding ledges 33,

34, respectively,` at and near Vthe lower end of the same. I Y

The last-mentioned inclined table terminates with its lower end at ornear a plane in'which the two `break rolls 25, 26 come in contact. Theoppositely-inclined tables are substantially of the same length as saidbreak rolls so that when the frame 23 is actuated the grain isdistributed over the two tables from end to end and Vis deliveredbetween the break rolls in a Vthin stream so that the break rolls areeffective from end to end thereof.

The mannerV of operating the shaker' or shoe 23 and'rotating said breakrolls will be described hereinafter.

Situated beneath said break YrollsV is Va scalper 35, and between saidbreak rolls and said scalper is a hopper 36 formed by plates or walls37, 38, which extend from the head end frame member 6 to the adjacentYintermediate frame member S. rl`he scalper 35 comprises a rotary brush39 and a suitable screen 40 of substantially semi-circular formation incross section, this screen being secured to a frame 41 pivoted to thetwo transverse frame members 6 and 3, as at 42. The scalper frame 41 ispreferably inclined so that the screen will tail ofi vfreely at a lowpoint, as at 43. Extending from said scalpeiframe is a bar 44 havingrathreaded opening throughk which an adjusting screw 45 is Vpassed whichbears against a fixed lug 46, so that upon rotating said Vadjustingscrew the screen may be adjusted toward or Cil from said brush, therebyregulating the amount ot stock, such as flour and iniddlings, to beremoved from the lran and more effectively cleaningl the bran.

Beneath the semi-circular screen 40 ot the scalper, hopper l? isarranger which is closed at its lower end and has'a senticircularportion e8 at said end. ln this semi-circular portion conveyor e9 ispositined.

The shafts 50, 5l of the breali i ills 25, respectively, are journaledin bearing Inountings 52, 53 secured, respectively, in the transversetraine members 6 and S, and on the outer or liront end of shaft 59 apulley 54: is secured. This pulley is situated in front of the head endtransverse traine meinber 6. The shat't 5l has a pulley 55 securedthereto in rear ot the transverse traine niember 8. l` he pulley 54tisrotated from the pulley 2O on tne main or power shaft l5, in. a mannerto appear hereinafter.

Secured to the shattv 5l in rear ot the pulley 55 is a pulley 56 aroundwhich a belt 5? is passed, which also passes are ,nd a pulley 58 securedto the inner or rear end ot the shaft 59 on which the rotatable brush 3of the scalper is secured. The belt 57 is crossed to cause the brush totravel to the right in Fig. 5. rlhis crossing ot the belt isnecessitatec, due to the tact that the break roll 26, to the shaft oiewhich the pulley 56 is secured, travels to the lett, and a reverse otthis movement is required in order to carry the stock delivered into thescalper screen over the lower end thereoi, from which point it isdischarged into a hopper GO, which delivers the material between asecond set of break rolls, which the rolls 6l, 52 constitute. rlheshafts ot these rolls are also journaled in bearing niount ings secured,respectively, in the transverse trame members 6 and 8.

rlhe material worked through the screen of the scalper 85 is carried bythe conveyor `L9 through a conveyer tube GS extending' from theintermediate traine member 8 through a bushing? Gel. formed on acentritugal bolting reel located in the part or section 5 ot' then'iachine between the intermediate traine memher 9 ano the tail endtraine member T, the `Four beine' bolted out through the sill or wireoit said bolting reel and bei delivered into a hopper 66 from which itis delivered into a second hopper 6T havingv a senii-circular lower end68 in which a conveyor (S9 arranged, the conveyer 39 serving' to conveythe vflour to an outlet l0 which may led to i any suitable point or haveconnection with any suitable point tor storinf or packing the flour.

ne tail over the reel 65.. which inay he termed the first break reel.and are dcliveredinto a hopper 71., havingl a depending le .L leading toa conveyor tube dli 'Z3 in which a conveyor 2lis located.. rlhe conveyerle conveys the material to the bottorn ot an elevator 75, which may heof any suitable construction but is wholly within the mill and by meansoft which the middlings are carried up into a conveyer tube 7 6 havingconvcyer therein. The conveyer Zet conveys tiey material to the shoe orshalier 23 which is provided at that end opposite the table 27 with aninclined table Z8 having an upstandingledge 7 9 near its lower end, anda similar ledge 39 its lower end. rllhis table is constructed similar tothe table 2'? at the other end ot the shoe or shaker and serves todistribute the tailings the full length thereolf when said shoe orshaker is actuated, the material passing' over the ledge S0 at the lowerend ot' said table and dropping onto a second and oppositely-inclinedtable having` an upstanding ledge 82 at its lower end. This tabletern'iinates to feed the iniddlings between two rolls 83, Se, whichconstitute the i'irst pair or reduction rolls ci" the machine and theshafts of which are jonri'ialed in bearing niountings 52, 58 secured,respectively, in the transverse trame members 6 and 8.

ln order to regulate the flow oit the iniddlings from the conveyer tube76, a gate 85 is provided which may be actuated to close the outlet 86in said tube to any desired degree.

lt may here be mentioned that the brealr rolls 25, 26, Gl and 62 arecorrugated in the usual manner, while the reduction rolls 83 and 811-,and such reduction rolls as may be hereinafter described, are smoothsurfaced.

Bearing against the two reduction rolls 83, 84tis a scraping` device S7which coinnrises two scrapers S8., 89 bearing, respectively against saidreduction rolls at their lower most points. rlhese scrapers 88, 89 aresecured to a traine 90 pivotally attached to levers 91, 92 mounted toswing on pivots 93, 94: exten-cling, respectively, trom the head endtraine member G and the adjacent intermediate trainc member 8. T Aeselevers 9i and 92 are pivotally mounted between their ends and secured tothe outer end ot' each lever is one e fl ot a retractile spring` 95,fastened with its other end, as at 96, to a` lined pointl ot themachine, preferably to the adjacent transverse trame members. Theseretractile springs serve to hold the Scrapers 88, 89 with poner pressureagainst the reduction rolls 83, 8l, removing trom the latter alladheringl particles.

The iniddlings passing between the reduction rolls 83, Sel, arepartially reduced to flour, and this product. or material 'falls into ahopper 9'? havinp; a closed semi-circular lower portion ln the lower end'of this hopper a convever 99 is arranged which extend.' rearwardly andhas its shaft 100 continued through a bolting reel 191, said boltsaidreel.

ing reel having a sleeve journaled in the inter-mediate transverse framemember 9 in the same manner as the sleeve 64 of the bolting reel 65,shown in Fig. 4. A con-` veyer tube 102 extends rearwardly from the rearend of the hopper 97 and enters the journaled sleeve of said boltingreel. The material entering the hopper 97 is therefore conveyed Vby theconveyer 99 through the conveyer tube 102 and into said bolting reel 98,which may be termed the lirst reduction reel.

The bolt-ing reel 101 is covered through- Iout a portion of its lengthwith line bolting.

silk or wire 103, and it has a cut-ofi' or boxlike structure 1041- builtaround its rear end. This end is covered with bolting silk or wire 105of coarser mesh than the portion 103 of The material entering thisbolting reel is therefore separated owing to the finest material orfiour passing or being worked through the fine mesh silk or wire 103,while a coarser grade of material or the middlings passes or is workedthrough the coarser mesh silk or wire 105.

The flour or finished productpassing through the line mesh portion ofsaid reel enters the hopper 66 and strikes the inclined wall 106 of saidhopper located directly underneath said bolting reel. The outlet of saidhopper 66 is divided by' a verticallydisposed wall 107 into two passages108, 109. AFlour, `or the finished product, from the bolting reel 65,previously described, falls onto the inclined wall 110 of said hopper,owing to said wall being positioned beneath said last-mentioned boltingreel. The flour or finished product yof said last-mentioned bolting reelis thus directed through the passage 108 and falls into the hopper, 67,as hereinbefore explained, while the flour or finished product from thefirst reduction reel 101 passes through the passage 109 and enters ahopper 111 having a closed semicircular lower end 112 in which aconveyerV 113 is located. This conveyer 113 carries the flour orfinished material to an outlet 114, which may be led to any suitablepoint or have connection with any suitable point for storing or packingthe flour. This flour may be stored separately from the flour orlinished product passing through the outlet 70, hereinbefore referredto, or both these outlets may be led into a single storage hopper orreceptacle. It will be observed therefore that the different runs offlour may be stored separately or mixed together, as may be desired.

The material or middlings passing lor being worked through the coarsermesh silk or wire 105 of the bolting reel 101 falls into the cut-olf orbox-like structure 10-1,y which has a parti-circular vconfiningY wall115 and opens at 116 into a conveyer tube 117 having a conveyer 118located therein. The opening 116, whereby communication is establishedbetween said cut-off and said conveyer tube, is arranged at a pointsomewhat above the .lowest point of said parti-circular wall 115,

and for this reason the bolting reel is provided with sweep arms or bars119 which serve to carry the material passing or worked through thecoarse silk or wire ofv said bolting reel into said opening 116,Vthrough which it passes into the conveyer tube 117. This conveyer tubeand the conveyer therein extends forwardly through the intermediateframe members 9 and 8, and into the front end frame member-.6.

The tailings from the reel 101 are delivered f desired extent by meansof a gate 123. OnY

the shaft 124 of the conveyer 118, a cam 125 is arranged, against theVperipheral cam face of which a roller 126, mounted on theV free end ofone arm of an elbow lever 127, is adapted to act. This cam thereforecauses said lever to vibrate, and the vfree end of the other arm of saidlever is secured to a' vibrating shoe or shakerV 128 having an inclinedtable l129V directly beneath the outlet opening 122 of the conveyer tube117.

Nea-r it outer end the table 129 is provided with an upstanding ledge130, and a similar' ledge 131 is arranged at the outer end of saidtable.These ledges are similar to the ledges of the shoe or shaker 23,hereinbefore described, and serve to assist, during the vibration of theshoe or shaker, to distribute the material evenly over said platform.This material is delivered from said platform onto a second table 132inclined in an opposite direction and having an upstanding ledge 133 atits outer end. The outer end of said last mentioned table is positioneddirectly above a second pair of reduction rolls, which the rolls 134C,135 constitute, and the shafts of which are journaled in bearingmountings 52, 53, secured, respectively, to the transverse frame members6 and 8. It will be noticed that'I referred to the bearing mountingsl ofboth pairs of break rolls and both pairs of reduction rolls `by likenumerals of reference, for the reason that such mountings are all alike.Like the rolls 83, 811 of the first pair rof reand a scraping device 136similar to the scraping device 87 describedin connection with the lirstpair of reduction rolls, acts against the rolls 134, 135 at their lowestVduction rolls, these rolls are also smooth, f

points, serving to free the rolls from any material adhering thereto.

The material passing between the rolls 134. 135 is delivered into ahopper 137 sit-uated directly beneath said rolls, said hopper having alower semi-circular closed end 138 in which a conveyer 139 is arranged.rThe conveyer passes through a conveyer tube 140 extending rearwardlyfrom the inner end of the hopper, and this tube enters a bearing sleeveformed on a bolting reel 141, which reel may be termed the secondreduction rech7 in the same manner as the bearing sleeve 64 of thebolting reel 65, shown in Fig. 4. The material in the conveyer tube 140is thus conveyed by the conveyer 139 into said bolting reel 141.

r1`he bolting reel 141 is situated within the hopper 111 and flour is`bolted through the silk or wire covering this reel and escapes to thebottom of said hopper where it is conveyed by the conveyer 113 to thedischarge opening 114 hereinbefore referred to. r1`he unsifted materialor offal, tails over the rear end of the reel and enters a hopper 142,escaping therefrom through a leg 143 which may be led to any suitablepoint for storing or packing the ofal.

Returning to the material passing between the second pair of break rolls61, 62, hereinbefore referred to, this material enters a hopper 144formed by the plates 145, 146. From this hopper the material enters ascalping device or bran-finisher 147 situated beneath the second pair ofbreak rolls and being of the same construction as the scalping devicebeneath the first pair of break rolls.

The material passing through the screen 148 of said scalper orbran-finisher enters a hopper 149 into the upper portion of which saidscalper or bran-:finisher extends, while that portion of the stock whichis in the form of clean broad bran is brushed over the low end 150 ofsaid screen and from said point is directed into a duct or leg 151 whichhas its outlet at the bottom of the machine, as at 152, and at whichpoint the bran may be placed into sacks or suitable receptacles, or itmay be carried by suitable ducts to other points, as may be desired.rlhis scalper or bran-finisher separates all iour particles andmiddlings from the bran and discharges the bran from the machine.

Tithin the hopper, which is provided with a semi-circular lower end 153,a conveyer 154 is arranged. This conveyer eX- tends through a conveyertube 155 which has one end connected to said hopper and its other endentered in a bearing sleeve formed on a bolting reel 156, which may betermed the second break reel, similar to the bearing sleeve of thebolting reel shown in Fig. 4.

The bolting reel 156 is covered throughout a portion cf its length withfine mesh'silk or wire 1 through which the flour from the materialentering the reel passes or is worked, and this flour falls into thehopper 67 and is conveyed by the conveyer 69 therein to the dischargeopening 70. At its rear end this bolting reel is surrounded by a cutoii'or bcn-like structure 158 which has a parti-circular confining wall 159and opens at 160 into the conveyer tube 73 having the conveyer locatedtherein. This bolting reel 156 and cut-od are situated in the hopper 67and they are constructed in the same manner as the bolting reel 101 andcut-off 104, hereinbefore described. The coarser material or middlingspasses through the coarse silk or wire 161 of the bolting reel withinthe cut-off and is carried into the conveyer tube 73, it being conveyedforwardly by the conveyer 74 Within said tube to the lower end of theelevator 75, which elevates the same to the conveyer tube 76. Thesemiddlings are conveyed by the conveyer 77 within said tube to the firstpair of reduction rolls, through which they are passed and enter thehopper 97 to be conveyed by the conveyer 99 therein to the firstreduction reel 101, the material being reduced in passing through saidreduction rolls and the. flour from the reduced material passing orbeing worked through the fine screen of said reel, while the coarsermaterial is carried on within the reel and passes or is worked throughthe coarse silk or wire within the cut-olf 104, from which point it isconveyed by the conveyer 118 to the shoe or shaker 128, and from thelatter to the second pair of reduction rolls, where it is again reducedin passing between said rolls and is delivered into the hopper 137 to beconveyed by the conveyer 139 into the second reduction reel 141. Theflour or .finished product passing through the silk or wire of thislreel falls into the hopper 111 and is delivered by the conveyer thereinto the outlet 114. The offal or tailings is tailed over the rear end ofsaid reel and enters the hopper 142, from which it is directed into theleg 143, to be sacked or otherwise disposed of.

r1`he shoe or shaker 23 is hung on spring arms 162 fastened to the frameof the machine and it is vibrated by means of an arm 163 secured at oneend to the frame of the shaker nd at its other end to an annulus oreccentric strap 164 surrounding an eccentric 165 fastened on a shaft,the shaft being `iournaled in suitable bearings in the frameand having apulley 167 secured thereto at a point between the front end frame member6 and the adjacent intermediate frame member 8. On the main or powershaft 15, in alinement with the pulley 167 on the eccentric shaft 166,is a pulley 168, around which and said pulley 167 a belt 169 passes,

l, v Y

ithus Vthe eccentric shaft is rotated directly l frame member 8 and tothe front or outer end vof said shaft al pulley 174 is secured. Theshaft 175 of the reduction roll 84 is also journaled in bearings securedto said frame members, and at the rear or inner end of said shaft apulley 176 is secured. Similar bearings are provided for the shafts 177,178 of the two rolls constituting the second pair o-f break rolls andalso for the Y shafts 179, 180 of the two rolls constituting the secondpair of reduction rolls. To the outer end of the shaft177 of the roll 61of said second pair of break rolls, a pulley 181 is secured,-and asimilar pulley 182 ris Secured to the outer end of the shaft 179 of theroll 134 of said second pair of reduction rolls.

e Provision is made for rotating the break and reduction rolls and theconveyer 49 directly from the main or power shaft 15, and this is doneby passing a belt 183 over the pulley 20 of the main or power shaft 15,from which it is directed in opposite directions around thepulleys 181,182, thence around the pulleys 54 and 174, and thence around the pulley172, as clearly shown in Fig. 1 of the drawings. This belt is maintainedin tightened condition by means of an idler pulley 184 journaled inswingingl arms 185 pivoted to a bracket 186, which is fastened to thefront end' frame member 6. The bracket 186 has a lug 187 formed thereonthrough which a screw 188 is passed which bears against the arms 185 andretains the idler pulley 184, with proper pres-- sure against thestretch of the belt passing from the pulley 174 to the pulley 182.

It will be observed that the main or power shaftv 15 passes through theroll section 3 of the machine and extends through the intermediate framemember 8 serving,r as the rear wall of said roll section, and on therear or inner end of said shaft a pulley 189 1s secured. Around thispulley and the pulley 176 on the' shaft 175 of the reduction roll 84, abelt 190 passes, said roll being therefore rotated directly from themain or power shaft 15, as clearly shown in Fig. 6. A belt 191 passesover and in contact with the belt 190 at the point said last-mentionedbelt passes around the-pulley 176, and said belt 191 passes over apulley 192 secured to pair ofV reduction rolls, all `of saidipulleysbeing situated directly in rear of the inter.-

mediate frame member 8. Y

ISecured to the shaft 195 of the rotatable brush forming,` part of thescalper or branvfinisher 147, is a pulley 196 and around this pulley anda pulley 197 on the shaft 17 8 of the break roll 62 a cross belt 198passes. These pulleys and said cross belt being located in rear of theintermediate frame member 8.

As is common in elevator constructions,

the elevator 75 positioned in the space or section 4 between theintermediate frame members 8 and 9 comprises a housing 199, suitablepulleys 200, 201 at the upper and .lower ends, respectively, of saidhousing.

and a flexible bucket carrying element 202, which travels around saidpulleys. Onerof said pulleys, preferably the upper pulley, has securedto itsshaft 203 a pulley 204, which is arranged outside of said housing,and around this pulley and a pulley 205 on shaft 51, a cross belt 206passes.` The eievator is therefore actuated Vfrom the shaft 51 of thebreak roll 26.

While the conveyer 49 is rotated from the front end of the machine, theremaining; conveyers are all operated from the rear end of the same, aswill be presently explained.

IThe shafts of the conveyers feeding into the bolting' reels are allcontinued through said reels and serve as the shafts for the beaters ofsaid reels, the continuation of the shaft of the conveyer 49 beingdesignated by the numeral 207; that of the convcyer 99 being designatedby the numeral 208; that of the conveyer 139 being designated by thenumeral 209, and that of the conveyer 154 beinnjdesignated by thenumeral 210, these shafts being.' respectively, what may be termed thefirst, second, third and fourth reel or beater shafts.

To the rear end of the shaft 207 a pulley 211 is secured, similarpulleys 212, 213V and V214 are secured, respectively, to the rear endsof the shafts 208, 209 and 210, and around these pulleys a belt 215passes. The shaft 207, which is a continuation and in effect an integralpart of the shaft 171 of conveyer 49, is rotated from the front end ofthe machine by reason of the belt 183 passing' around the pulley 172secured to said shaft, and consequently the pulley y211` at the .rearend of said Vcontinued shaft may he considered the driving pulley torcausing si ening of the several disintegrators con- 'e r rotatie-n ofthe beater shafts S, .209 and structed With different size meshes,depend- The belt at the rear end ot' the machine is held in tightenedcondition b v idler pulleyY 216 iournaled in an arm or arms 21.7pivotalf: secured to a bracket 213 fastened to the rear end tramemembers T, said bracket having a lug 219 through which an adjusting'screnv Q20 is threaded and Which hears against the arm or arms Q17.

The ccnveyers 69, 113 and 11S are also rotated 'from the rear of themachine. The shafts 221, 222, 923 ot said conveyors having sprocketWheels '224. 226, respectivellv, secured thereto. around said sprocketWheels` a sprocket chain 227 is passed, said chain being also passedaround a sprocket wheel 998 secured to the shaft ot the conveyer 74C,said shaft extending forwardly through. the elevator housing and havingthe pulley 201 of said elevator secured thereto. The conveyer 7e istherefore rotated by said pulley 201 and the sprocket wheel 228 on theshaft ot said conveyer serves to rotate the conveyers 69, 113 and 118through the medium ot the sprockets on said lastmentioned conifeyers andthe sprocket chain 22T passing around said sprockets. In order to retainsaid sprocket chain in tightened condition, l provide a sprocket Yidler229,` over which said chain passes and which is journaled on anadjustable bearing 230 fastened to the rear end 'frame member 7.

Arranged Within the receiving or inlet end ot each bolting reel is adisintegrator 231, which is secured to the head end ot the reel so as torotate therewith. Each disintegrator comprises a hub 232 provided Withan nti-friction b aring 233 and a Web or lange 234 which serves as oneend Wall ot a screen cage 235the adjacent end ot the bolting reelserving as the `other end wall ot said screen cage. rl`he screen cage isof cylindrical formation in cross section, and its c vlindrical wall isformed of metallic screening 236. rlhe material to be ted into thebolting reels trom the several conveyers is first delivered b v saideonveyers into the disintegrators and from the latter into the boltingreels, the screening ot' the disintegrators being ot course ot coarsermesh than the silk screening of the reel in Which it is located. Arotatable brush 237 is arranged Within each disintegrator cage, saidbrush being secured to the conve'ver shat't and having its brush headformed ot steel Wire or other suitable material adapted to separate thestock delivered into the screen cage and Work the same through themetallic screening ot said cage. 1n this manner the material isthoroughly disintegrated when delivered into the bolting reel.

It may be found desirable to have the ing upon the ineness of thematerial delivered the-reinto.

At the rear or tail end oi each bolting reel a spider .like head 233 isprovided, each head having an akially-projecting sleeve or heb l23,)into which the cooperating beater shaft is journaled. Secured to eachhub or sleeve ,is a sprocket Wheel 5240, the sprocket Wheels of the fourreels being in vertical atinement and having a sprocket chain 241passingvaround the same. A sprocket idler 242 is g'ournaled on anadjustable bracket 2113 secured to the rear end trame member 7, saididler having the sprocket chain 241 passing over the same.

lt vvill be observed that the bolting reels are rotatable independentlyof the reel or beater shafts, or as 1 have termed them, thecontinuations of the conveyer shafts, and for this reason the hub orsleeve 239 of the firstbreak reel has a gear Wheel 244 tastened thereonwhich meshes with a pinion 245 secured to a counter-shaft 246 journaledin a bearing 2117. A gear Wheel 248 is secured to said counter-shaft 246and meshes With a pinion 249 secured to the beater shaft. The gear Wheel241i is prcif'ided with an extended hub 250 onto which is fastened oneot the sprocket Wheels To the hnbs or sleeves 239 ot' the remainingbolting reel the other sprocket Wheels 2-1-0 are secured.

The power imparted to the reel or beater shaft 207 which passes throughthe iirst break reel 65 is therefore transmitted to the gear Wheel@L1-9, secured to said shaft and from which said reel 65 is rotated inthe saine direction as said shaft but at a slower speed, through themedium of the gear wheel 24S, pinion .Q4-5, and gear Wheel 24:4, whichconstitute reducing gearing.

Since the sprocket Wheel 241e() associated with the first break reel 65is fastened to the extended hub ot gear Wheel 24:4, the remaining Wheelsare caused to rotate in unison with said reel, due to the sprocket chain241 passing over the sprocket Wheels 2110 on the hubs or sleeves .939 ofsaid remaining bolting reels.

As is common in bolting reels, the shafts extending therethrough areeach provided with spiders 251, to the outer end of Which blades 252 aresecured which are arranged to throw the material against the boltingsilk., said spider and blades forming the beaters hercinbetore referredto. One end ot each reel is rotatable Within an opening formed in atransverse Wall 253 Which Jforms a tailing section at the rear end otthe reel section It, and betwee. the bolting reel and theY Wall ot theopening, suitable packing 25o is interposed, thus preventing the mixingof stock in the reel section and tailing section.

lOG

Jee

In the rear end frame member 7 alined with the boltinfr reels are oJeninffs 256 the C 7 l C) i diameters of which are slightly larger thanthe diameters of the largest part of the bolting reels7 and in theseopenings removable bearing members 257 are situated in Which the sleevesor hubs 239 of said reels are journaled. lVith this arrangement, thebolting reels ymay be Withdrawn from the machine Without removing theWalls of the machine or disassembling other parts of the machine. 'lnthe upper end of the reel compart- ,ment a vibrating dust screen 258 issituated, this screen being spaced from the top Wall of said compartmentto provide a surtion chamber 259. This screen is supported at its endson cleats 260 and is therefore free to flex between the cleats. It isprovided With an intermediate cross bar 261 to which Wearing plate 262is secured. Against said Wearing plate a cam 263'acts to cause vibrationof said screen that any flour adhering to the under side of the screenwill free itself and fall into the hopper K (i6, YWhile the moistureladen air Will pass through the screen and beY draivn through a suctiontube 264 opening into a boi: 265 connected tothe eye of a suction fan265, from which it is forced through an opening 267 in the bottom of theroll section venting into the atmosphere. rlhe cam 26? is secured to theshaft 203 by means of which the elevator is driven, The shaft 268 of theconveyer 77 by moans of which materia is carried to the first pair ofreduction rolls, is provided' with a sprocket Wheel 269 around which anda` sprocket Wheel 270 secured to the shaft 203 a sprocket chain 271passes, thus driving said conveyer Z7 from the elevator head shaft 203.

A`Upon examination of Fig. 14 of the dran'- ings, the 'flow of thematerial through the machine Will be clearly understood, this flew beingas follows The clean Wheat fed into the machine passes between the firstpair of break rolls, designated by the numerals 25 and 26, materialbeing delivers,rl therefrom into the rotary-scalper 35. Part of thematerial from the scalper isV delivered by the conveyer 49 into thefirst break reel 55, While the coarser `material or overtails which doesnot pass through the sieve of the scalper is delivered into the secondpair of break rolls, designated by the numerals 6l, 62.

The first break reel acts to bolt out all the -flour from the materialdelivered thereinto, which flour is delivered out of the machine forstorage or packing in the manner hereinbefore described. The overtailsor middlings from this reel are delivered to the'first pair of reductionrolls, designated by the numerals 83, 84, through the medium ofthe partshereinbefore described. The overtails 'from the rotary scalper 35 havingbeen delivered to the second pair of break rolls and ground thereby, isconveyed into the rotary scalper or brand-finisher 147 situated'beneathsaid second pair of brake rolls, the clean bran or overtails from saidscalper or bran-finisher being delivered out of the machine for packingor storage, While the finer material is Worked through the sieve of thescalper and carried to the second break reel 15G, Where all the flour isbolted out and passes out of the machine for packing or storage in themanner hereinbefore described. rlhis reel has a cut-off at its tail endthrough Which the middlings are scalped and conveyed, in the mannerhereinbefore described, to the rst `pair of reduction rolls. rl`hemiddlings from the first break reel and the middlings from the secondbreak reel 156 are therefore conveyed v in two streams to said firstpair of reduction rolls. rlhe overtails or ofial of this second breakreel is delivered out of the machine for sacking or otherwise. rllhemiddlings from both break reels are then ground by said first pair ofreduction rolls and the ground stock conveyed thereby into the firstreduction reel 101, in the manner hereinbefore described, the flourbeing bolted out, While the middlings enterthecut-o at thek tail end ofsaid reel and are again delivered into the second pair of reductionrolls, designated by the numerals 134, 135.V The overtails or offal ofthe first reductionroll are conveyed out of the machine to Lbe sacked orotherwise disposed of. The middlings conveyed to the second pair ofreduction rolls are again ground by said rolls and conveyed by meanshereinbefore described, to the second reduction reel 141, Where theflour Yis bolted out and delivered out of the machine for packing orstorage and the overtails or finish are spouted out of the machine to besacked or otherwise disposed of. y

It is of course understood, having reference to Fig. 14, that the flowof the grain, indicated by the arrovv lines, is through conveyers,hoppers, and anelevator, as clearly shown in the remaining figures. Oneof the rolls of each pair of break rolls, and one roll of each pair ofreduction rolls is adjustable toward and from the other roll of thepair, and for this purpose bearing mountings are provided at each end ofeach pair of rolls. These mountings are exact counterparts, and like themountings of the first pair of break rolls, those of the remain-k ingrolls are also designated by the numerals 52, 53. The mountings are ttedWithin openings in the front end frame member fi and the intermediateframe member A8, each mounting having an arm 272 extending therefromvand having a journal member 273 pivotally connected thereto, as at 274.One of the shafts of eachV pair of rolls is journaled axially in themountings 52, 53

arranged respectively in the frame" members G and 8, and ther other inthe journal inein-y ber .273, each journal 'member having a forkprojection 27 5, through one arm 276j of rwhich a" rod 277 is adjustablysecured. Sai'drod has one end encircling"4 an eccentric 278fastened to ashaft 279 journaled in the arni 272 of the bearing mounting.

Surrounding' the other end of said rod 277'is a spring 280 whiclirbear'swith one end against the arm V276 of said fo-rkproject'ion and with itsotherV end against a' nu't 281 threaded on to said. rod.r Passingthrough the other arm 282 of said fork projection is a set screw 283,which bears against the adjacent end of they rod 277 and is adjustable'witl'iinsaid arm 282. A` jamb'nut 284 is threaded onto said set screwto hold the latter in any adjusted position. Secured to the shaft 27 9is a lever' 285, to the out-er or upper end of which a rody 286 issecured having a handle 287, said rod 286 is provided with a series ofnotches 288 adapted to have any one of the notches of the series engagea eatchbar 289 fastened tothe frame of the machine.

In the event of any foreign substance entering the machine with thewheator other grain andbeing delivered between any pai-r of rolls,` thepivotedV journal member 273 will swing to cause the roll journaledtherein to move away from\ the roll j ournaled in the' bearing mountings52'and 53, and` during such movement the spring 280 surrounding the rod277 is compressed. The set screw is adapted for adjusting the rolls tothe exact degree of grinding desired'. While. if it isv desired tomanually swing one of the rolls away from the other, the rod 286 isdisengaged from the catch bar 289 and drawn to the position shown indotted lines in Fig. 13, which causes the throw of the eccentric-to movethe rod 277 in the direction of the arrow in Fig. 1l, thereby swingingthe journal members 273 on the bearing mounting 52 and 53.

The walls of the hoppers in the reel sec tion are louvered and thusprovide openings or passages 290 as best shown in Fig. 7. Air is drawninto the reel section in the manner hereinbefore described and in itsupward movementthrough the reel section passes through said openings 290and through the falling flour, thereby cooling the flour and drawing offall moisture released by the grinding of the wheat or other grain.

It is to be understood that this invention is not to be limited to theuse of the construction set forth, but rather that it shall include allreasonable departures or variations falling within the scope of theappended claims.

Having thus described my invention,'wliat I claim; is

1. In a flour mill, the combination of a pair of break rolls, ab'oltingreel, a scalper throu-gl'i which the stock from said break rollspasse-s, means for delivering the material from said scalper to saidbolting reel, a second pair of break rolls,means for delivering stockfrom said scalper to said. second pair of break rolls, a second scalperassociated with said second pair of break rolls and receiving the stocktherefrom, a

second bolting reel, means for conveying stock from said second scalperto said second bolting reel, a pair of'reductionl rolls, .means forconveying middlin gs from said first-mentioned bolting reel to said pairof reduction rolls, means betweenfsaid second bolting reel and said pairof reduction rolls for delivering stock to said last-mentioned rolls, athird bolting reel, means for conveying stock from said pair ofreduction' rolls to said third bolting reel, a second pair'of reductionrolls. means for delivering miiddlings from said third bolting reel tosaid second pair of reduction rolls, a fourth bolting reel,--and meansfor delivering material from said second pair of reduction' rolls tosaid fourth bolting reel.

2. In a mill, the combination of two pairs of break rolls situated onepair above the other, two pairs of reduction rolls situated one pairabove the other, means for delivering material passing through the upperpair of break rolls tothe lower pair of break rolls and for deliveringmaterial from the upperl pairof break rolls to the upper pair ofreduction rolls, means for delivering material from said upper pair ofreduction rolls to sa'id lower pair of reduction rolls, said deliveringmeans including scalpers and bolting reels whereby the stockV passinglthrcnt'igh-V saidd'elivering meansA is separated, and means forsep'aratingthe material after havingpassed through said secondv pair ofbreak rolfl's and chlivering'5part thereof out the mill.

3. In a mill, the combination with a roll section, of a pair of breakrolls within said section, a rotary scalper beneath said break rollsinto which the material from said rolls is delivered, a second pair ofbreak rolls situated beneath said first pair of break rolls and intowhich material from said scalper is delivered, a second rotary scalperbeneath said second pair of break rolls receiving the material from saidsecond pair of break rolls and delivering part thereof out of the mill,a pair of reduction rolls at one side of said first-mentioned breakrolls into which material from both said scalpers is delivered, and asecond pair of reduction rolls situated beneath said first-mentionedpair of reduction rolls.

4. In a mill, the combination of two pairs of break rolls, two pairs ofreduction rolls, a bolting reel associated with each pair of xsaidrolls, and a scalping device associated 1c ing device under the secondpair of break rolls.

(j. In a mill, the combination of two pairs ofvbreak rolls, meansbetween said pairs YV'of rolls for separating the line stock from thebran, and a scalping device beneath the second pair of break rollsarranged to separate the fine stock from the bran and deliver clean branout of the mill.

7. In a mill, the combination of a casing having a roll section, a reelsection, and an intermediate section, break and reduction rolls withinsaid roll section, bolting reels within said reel section and adapted toreceive material passed through said break rolls and said reductionrolls, a suction device in the lower end of said roll section, a dustspace in the upper end of said reel section separated from the spacecontaining said reels by a screen, and a tube connecting said screenwith said suction device and extending through the intermediate section.

8. In a mill, the combination with a cas ing having a roll section, areel section and an intervening section, break rolls and reduction rollsarranged in pairs in said roll section and having the shaft of one rollof each pair extending into said intervening section,

a rotatable scalper beneath one pair of break rolls including a sieveand a brushliaving its shaft extending into said intervening section, adriviig shaft, means for rotating the rolls having their axles extendinginto said intervening section from said driving shaft,

and means for rotating the brush of said scalper from the shaft of oneof saidV rolls extending into said intervening section.

9. In a mill, the combination of a plurality of rolls, a plurality ofbolting reels receiv said reduction rolls, a suction device outsidev ofsaid reel section, and a dust screen in saidv reel section above saidbolting reelsspaced from the top wall of said reel section, the

Space between said screen and top wall hav-- ing connection with saidsuction device.

11. A mill having power-driven elements, driving means for saidelements, a chamber provided with a bolting reel, aspace above saidbolting reel divided into two parts by a screen, means operated by thedriving means of one of said power-driven elements for vibrating saidscreen, and a suction tube in. connection with the space above saidscreen.

1.2. A mill having power-driven ele-ments, driving means forsaidelements, a chamber provided with a bolting reel, a spaceabove saidbolting reel divided into two parts by a screen, means operated by thedriving means of one 'of said'power-driven elements for vibrating saidscreen, and a suction tube in connection with the space above saidscreen. Y

In testimony whereof I affix my signature.

CHARLES 'rj HowsoN,`

